I know this is a science forum and not a forum for conspiracy theorists but I have always been intrigued by the idea of a world where everyone has access to 'free' energy. What impact would it have on the world? Would it solve 99 per cent of all problems?
Actually, you know shit. Energy in the Universe does not evaporate. It goes from one form to another. The fact that we (humans) don't know how to use the infinite energy of the Universe, doesn't mean that there won't be a way for us to USE (not manufacture) free energy.
I watched this documentary about a European engineer (I think Romanian) who invented an electrical generator, that uses the Earth graviational field to produce 200W of electricity. All materials used were basic - rotors, weights, dynamos etc.
What you also need to know is that Tesla invented back in the 1900s a method of wireless electricity transmission. His main financier, however was one of the biggest producers of copper wiring and he stopped his funding.
Of course when there is a matter over trillions of dollars rich people wouldn't just go with new methods of free energy. That would ruin everything for them. In 100 years they will probably "invent" (consider pull ot of a safe) a new way for free energy, but they will still sell it to people, just for 10 times lesser amounts of money than now.
If anyone could produce, sell and distribute their own energy, then the center of power would shift. And power is more addictive than any drug, or money.